Air distributing unit



June 8, 1948. H. R. SEWELL EI'AL AIR DISTRIBUTI'NG UNIT Filed March 51, 1945 Jnverzlor: A VRV R Jew/4,4- and 720194- 21- 7. K L E w'i'i-i'vrne Patented June 8, 1948 AIR DISTRIBUTING UNIT Henry R. Sewell, Norwell, and Robert T. Palmer,

Sharon, Mass., assignors, by mesne assignments, to Westinghouse Electric Corporation, a corporation of Pennsylvania Application March 31, 1945, Serial No. 585,890

This invention relates to air distributing units in which conditioned air from a central source is supplied under pressure, and in which the conditioned air induces the flow of air recirculated from the space served.

The Cano Patent No. 1,995,667 and the Keyes Patent No. 2,000,597 disclose air distribution units in which conditioned air from a central source is passed through ejector nozzles for inducing the flow of recirculated air through inlets in the sides of the units, and in which the mixed recirculated and conditioned air is discharged throu h outlets in the tops of the units. A disadvantage of such units is that they were designed primarily for air cooling, and do not provide proper distribution when the conditioned air is heated air. With such units the heated air is projected vertically upwards, overheating the ceiling space.

This invention provides a local distribution unit of the type disclosed by said patents but differs therefrom by including provisions for drawing in recirculated air through the top of the unit, and for discharging the mixed recirculated and conditioned air from a vertical side of the unit, in the heating season.

An object of the invention is to improve the distribution of heated air from local distribution units, supplied with conditioned air from a central source.

The invention will now be described with reference to the drawing, of which:

Fig. 1 is a side elevation with a portion of the front side removed, of an air distributing unit embodying this invention;

Fig. 2 is a sectional view along the lines 2-2 of Fig. 1;

Fig. 3 is a sectional .view along the lines 3-3 of Fig. 1, and

Fig. 4 is an enlarged, projected view of the slide adjusting mechanism used.

The unit has the conditioned air pressure chamber I into which conditioned air is supplied through the duct II from a. central source such as that disclosed in said Cano patent. The chamber III has the inner vertical wall I2 having the spaced perforations I 3 therein, and has the upper wall M with the spaced nozzles I5 formed therein.

The plate I6 with the perforations I I correspending in number, spacing and size to the nozzles I5, is slidably supported between the horizontal flanges I8 at the opposite ends of the unit, and contacts the underside of the wall I4.

The plate I9 with the nozzles 2:) formed therein, and which correspond in number, spacing and size to the perforations I 3 in the wall I2, is slida- 2- Claims. (01. 98-38) bly supported between the vertical flanges 2| at the opposite ends of the unit, and contacts the outer side of the wall I2.

The knob- 22 at the front side of the unit, is connected to the rod 23 which in turn, is connected to the extension 24 of the plate I6, and serves to slide the plate I6, when pulled forward, from the position shown by Fig. 2 where the inlets of the nozzles I5 are in alignment with the per-- forations I1 in the plate IE, to a position where the nozzles I5 and the perforations I! are out of alignment.

The lugs 25 on the underside of the plate I6 arepivoted to the links 26 at the opposite ends of theunit. The links 26 are connected to the links 21 which are pivoted to the lugs 28 on the outer side of the plate I9. The links 26 and 2'! are rotatably supported on the shafts 29 which extend inwardly from the ends of the unit.

When the plate I6 is moved as previously described, for moving the perforations II out of alignment with the nozzles I5, the plate l9 is moved upwardly by the described mechanism including the links 26 and 21, from the position shown by Fig. 4 where the nozzles 20 are out of alignment with the perforations I3, to a position where the nozzles 20 and the perforations I3 are in alignment,

Thus when the knob 22 is in the position shown by Fig. 2, the upper nozzles I5 and the upper perforations II are in alignment, and the side nozzles 20 and the side perforations I3 are out of alignment, and when the knob 22 is pulled forward, the upper nozzles I5 and the upper perforations I 'I are placed out of alignment, and the side nozzles 20 and the side perforations I3 are placed in alignment.

The grille 30 is alongside the nozzles 20, and serves as a recirculated air inlet grille in the cooling season, and as an air discharge grille in the heating season as will be described.

The upper grille 3| is in the top of the unit, and serves as a discharge grille in the cooling season, and as a recirculated air inlet grille in the heating season as will be described.

In the cooling season when chilled, dehumidified air is supplied through the duct II, the knob 22 is positioned as illustrated by Fig. 2 whereby the nozzles I5 and the perforations II are in alignment, and the nozzles 20 and the perforations I3 are out of alignment. The conditioned air passes from the chamber I0 through the perforations I1 and the nozzles I5, and induces the flow of recirculated air through the grille 30, and the mixed conditioned and recirculated air is discharged from the grille 3! as disclosed by said patents. The continuous arrows indicate the air flow at this time.

In the heating season when heated, humidified air is supplied through the duct II, the knob is pulled forward away from the front side .of the unit causingthe nozzles 15 andzthe perforations IT to be placed out of alignment, and the nozzles 20 and the perforations l3 to be placed in alignment. The conditioned air then passes from the:

chamber l through the perforations l3 and the nozzles 20, and induces the flow of recirculated" air through the upper g ille 3L a d' i recirculated air and conditionedair is discharged from the lower grille 3B. Thedash dot arrows indicate air flow at this time.

The conventional heat exchanger 32-is located between the grilles 39 and 31, and serves as is usual, to change the sensible heat ofithe air.

passing over its surface if that is necessary.

Units embodying this invention-may be supplied-.with: conditioned air through small-ducts or pipes as disclosed in the A. J. Lawless Patent No. 2 159376, the recirculation taking place at the local units whereby there isno need for the ducts for conveying recirculatedair-back to the central conditioner.

While one" embodiment of the invention has been: described for thepurpose of illustration, it should be understood that the invention. is not limited to-the exactapparatus and arrangement of apparatus illustrated, as modifications thereof may'be suggested by those skilled in the'artwithout depa'rture fromthei-essence of the'invention'.

WhatTis claimedis:

ll-Ani-air distributing unit having an upper opening"v and a lower openin a first ejector nozzle placed to discharge towards said upper opening; a second eiector'nozzle' placed'to discharge towards said lower opening; means for directing conditioned air supplied from a central source, into said nozzles, and means for renderirfg'saidfir'st nozzle ineffective and said'second nozzle e'iiective; air through said secondnozzle' induces the flow whereby the flow of conditioned opening, a second-ejector nozzle placed to discharge 'toWards said lower opening, means for directing conditioned air supplied from a central source into said nozzles, and interconnected meansffor closing off the supply of air to one of said nozzles and for opening up the supply of air to-the other ofsaid nozzles, said unit having walls around and interconnecting.- said, openings: wherebywhen said first nozzle dischargescondistioned air towards said upper opening, air. is. induced to flow into said lower opening for mix ture with the. conditioned air, and whensaid second nozzle discharges conditioned air towardssaid'lower opening, air is. induced to flow. into saidupper opening. for mixture with the condi-- tioned-air.

HENRY R. SEWELL. ROBERT T. PALMER.

REFERENCES CITED Thefollowing references are of recordtin'the' the of i this patent:

UNITED STATES PATENTS Number Name Date 1,890,521 Mack Dec. 13,- 1932 2,021,583 Whiteley Nov. 19, 1935" 2,022,333 Woolley Nov. 26, 1935 2,037,857- Fox Apr. 21; 1936- 21401787 Cornell, Jr Dec. 20, 1938- 2345536 Keep Mar. 28, 1944- 

